Cutting armored cable may seem daunting, but with the right tools and technique, you can do it safely, neatly, and efficiently. Follow this guide based on electrician best practices and real-world experiences.
how to cut armoured cable
✅ 1. Safety First: Always Turn Off the Power
Before you even touch the cable:
Shut off the power from the circuit breaker.
Use a non-contact voltage tester to confirm the cable is de-energized.
Wear cut-resistant gloves and safety glasses to prevent injuries.
💡 Tip: Never trust the switch alone — always verify with a tester.
2. Understand Your Cable Type
SWA (Steel Wire Armoured) – stiff and robust
MC / BX Cable – flexible metal sheath
PVC-coated or STA – thinner armor
Different thicknesses require different tools.
🛠️ 3. Tools You’ll Need (By Cable Type)
| Cable Type | Recommended Tools | Why |
|---|---|---|
| MC / BX | Side cutters (e.g., Klein 1104) | Quick, clean cuts without damaging conductors |
| SWA (thin) | Roto-Split tool / Armoured Cable Stripper | Clean scoring without cutting inner wires |
| SWA (thick) | Hacksaw or Angle Grinder (cut-off wheel) | Best for cutting through dense steel armor |
⚠️ If using a grinder, clamp the cable and work in a well-ventilated area.
4. Step-by-Step Cutting Process
Kink/Bend the cable at the cut point to weaken the sheath.
Score the armor with tools (RotoSplit or hacksaw).
Snap and unfold the sheath.
Cut internal conductors with insulated tools.
Smooth edges with a file or tape to avoid sharp bits.
🧼 5. Cleanup & Protection
Trim back any stray metal strands.
Cover sharp armor edges with PVC tape or protective sleeves.
Inspect for nicks in insulation — cut back and re-strip if needed.
Apply corrosion protection if the cable is exposed outdoors.
6. Troubleshooting Common Issues
Bent armor: straighten before termination.
Corrosion: file and coat metal parts for sealing.
Damaged conductors: cut back and re-strip.
7. Want a Quick Visual Insight?
Watch this simple demonstration using a RotoSplit-style cutter:
🧰 8. Pro Tips from Electricians
Use a Jubilee clip or cable clamp to hold the cable while cutting.
For large cables, a grinder with a thin cut-off disc is much faster.
Invest in a dedicated armoured cable stripper for frequent jobs.
If working outdoors, seal ends with heat shrink and weatherproof tape.
✅ Final Takeaway
Cutting armored cable is straightforward when you:
✅ Cut power and stay safe
✅ Match cable type to tools
✅ Follow a clean, step-by-step method
✅ Finish with cleanup and inspection
Ready to tackle your own cable projects? With the right approach, you'll cut like a pro every time.
